var fs=require('fs');
var path=require('path');

var subDir = process.argv[2];
var filter = process.argv[3];

fs.readdir(subDir,function(err,list){
     if(err){
        console.log(err);
    }else{
       console.log(list);
       for(var item of list){
           if(path.extname(item) === '.' + filter){
               console.log(item);
           }
       }
    }
});
